78976645 has 16 divisors (see below), whose sum is σ = 109470528. Its totient is φ = 54058240.

The previous prime is 78976643. The next prime is 78976669. The reversal of 78976645 is 54667987.

It is a happy number.

It is not a de Polignac number, because 78976645 - 2¹ = 78976643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78976592 and 78976601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78976643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41299 + ... + 43168.

It is an arithmetic number, because the mean of its divisors is an integer number (6841908).

Almost surely, 2^78976645 is an apocalyptic number.

It is an amenable number.

78976645 is a deficient number, since it is larger than the sum of its proper divisors (30493883).

78976645 is a wasteful number, since it uses less digits than its factorization.

78976645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84500.

The product of its digits is 2540160, while the sum is 52.

The square root of 78976645 is about 8886.8804988027. The cubic root of 78976645 is about 429.0417547469.

The spelling of 78976645 in words is "seventy-eight million, nine hundred seventy-six thousand, six hundred forty-five".